@article {Irwin29, author = {Scott H. Irwin and Diego Landa}, title = {Real estate, futures, and gold as portfolio assets}, volume = {14}, number = {1}, pages = {29--34}, year = {1987}, doi = {10.3905/jpm.1987.409128}, publisher = {Institutional Investor Journals Umbrella}, issn = {0095-4918}, URL = {https://jpm.pm-research.com/content/14/1/29}, eprint = {https://jpm.pm-research.com/content/14/1/29.full.pdf}, journal = {The Journal of Portfolio Management} }